Which of the following statements about Rutherford's model of atoms are correct? (i)Considered the nucleus as positively charged.(ii) Established that the alpha-particles are four times as heavy as a hydrogen atom. (iii) Can be compared to solar system.(iv) Was in agreement with Thomson's model.
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Answer:
Alpha particles are positively charged and were deflected by the nucleus. This showed that the nucleus is positively charged. Rutherford also postulated that electrons are arranged in an atom around the nucleus, in the same way as planets are arranged around the Sun in the Milky Way.
Hence correct option is (A).
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The Nucleus being positively charged is the correct statement about Rutherford's model of atoms.
Explanation:
- Alpha particles are positively charged. These particles are deflected by the nucleus. As a result, the nucleus is positively charged.
- In Rutherford's model, a central positively charged nucleus is present in the atom. Therefore, electrons revolve around it.
- A radioactive element emits alpha particles. These particles are then directed towards a thin sheet of gold. This sheet is surrounded by a screen. It allows the detection of deflected particles.
- Rutherford's model does not follow the law of conservation of energy.
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